Automatic-cut-off gas-burner



(No Model.) I. P. CUSHMAN.

AUTOMATIC GUT-OFF GAS BURNER.

No. 590,003, Patented Sept. 14,1897.

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FRED F. OUSHMAN, OF BOSTON, MASSACHUSETTS.

AUTOMATlC-CUT=DFF GAS BURNER.

SPECIFICATION forming part of Letters Patent No. 590,003, datedSeptember 14, 1897.

Application filed J ly 6, 1897. -Se1'ial No. 643,525. (No model.)

To (LZZ whom [It nuu concern.-

Be it. known that I, FRED F. GUSHMAN, of Boston, county of Suffolk,State of Massachusetts, have invented an Improvement in Automatic-O'ut-Oif Gas-Burners, of which the following description, inconnection with the accompanying drawings,- is a specification,

like letters on the drawings representinglike.

parts.

This invention has for its object to improve gas-tip is also carried bysaid eXpansible ring, I

and a springis provided, the action of which is to draw down the ringand valve-plate carried by it to cause the latter to close upon thevalve-seat and thereby cut off the gas.

Means are provid ed for raising the ring and valve-plate sufficiently toallow the passage of gas, and as soon as the gas is lighted the heattherefrom will expand said ring and cause it to frictionally engage thetubular portion of the case or body in which it telescopically slidesand to thereby hold the valve-plate in its elevated position. Then theheat disappears, the expansible ring contracts and the valve-plate willbe at once drawn down to close upon the valve-seat and cut off the gas.

Figure 1 is a side elevation of an automatic cut-off gas-burnerembodying this invention, and Fig. 2 a vertical section of the same.

The case or body a is formed or provided with aninternally-screwthreaded portion a for connecting it to the gas-pipe,and also with a diaphragm orpartition-wall C62, extending horizontallyacross it, dividing said case or body into two parts, and above saiddiaphragm or partition-wall a said case or body is formed or providedwith a tubular portion 00, preferably made cylindrical, and risingcentrally from the diaphragm or partitionwall a is aprojection at,having ahole through body a is composed, and said expansible ring Z) ismade of a size to slide freely in said tubular portion a whencontracted, but to friction-ally engage and firmly bind when expanded.

The expansilole ring?) carries a valve-plate b, which is constructed andarranged to rest upon the valve-seat a and thereby shut off the gas, andsaid valve-plate is herein formed with holes 12 through it for thepassage of the gas into the chamber above it.

A tip 0 of any well-known or suitable construc'tion is surmounted on thevalve-plate b, or it may be the expansible ring I), and said tip isherein shown as having a circumferential flange b projecting from it.The tip a, valve-plate, and expansible ring therefore rise and falltogether, and a pin cl passes up through the hole in the projection awhich is screwed into the valve-plate b, and aspring d encircles saidpin between its head and. the diaphragm or partition-wall a the actionof said spring being to draw the valve-plate 1) down and close it uponthe valve-seat to shut off the gas.

A plunger 6 has its hearings in cars a, projecting from the case or bodya, and said plunger is encircled by a spring o one end of which bearsagainst one of the ears and the other end against a nut or projection eon the rod, the tendency of said spring being to normally hold the rodein its lowermost posit-ion. The upper end of the rod 0 is formed with aprojection or flange e, which occupies a position beneath the flange bon the tip, and said plunger-rod is designed to be used by pressing itupward to thereby raise the tip and valve-plate connected therewith toallow the passage of the gas.

lhe operation of the device is as follows: The operator will press theplunger-rod c upward and thereby lift the tip and valve-plate andexpansible ring connected with it, so that the valve-plate will belifted off of its seat and the gas thus allowed to escape, and then thegas is lighted, and the heat generated is suflicient to cause theexpansible ring I), which is thus held in elevated position by theoperator, to expand and bind firmly within the tubular portion a andthereby hold the valveplate in its elevated position with the gaspassageopen. hen the gas is turned off or blown out, the expansibleringbimmediately contracts and will then be drawn down by the spring (1to close the valve-plate upon its seat.

I claim 1. In an automatic-cutoff gas-b urner,a case or body having agas-passage, a valve-seat, and a tubular portion, an expansible ringsliding telescopically in said tubular portion When contracted, andadapted to frictionally engage therewith when expanded, a valveplatecarried by said expansible ring which closes upon said valve-seat to cutoff the gas, substantially as described.

2. In an autoinatic-cut-off gasburner, a case or body having agas-passage, a valve-seat, and a tubular portion, an expansible ringsliding telescopically in said tubular portion when contracted, andadapted to frictionally engage therewith when expanded, a valveplatecarried by said eXpansible ring which closes upon said valve-seat to outoff the gas, and means for raising said valve-plate and ring,substantially as described.

3. In an aut0n1atic-cut-off gas-burner,a case or body having agas-passage, a valve-seat, and a tubular portion, an expansible ringsliding telescopically in said tubular portion when contracted, andadapted to frictionally engage therewith when expanded, a valveplatecarried by said expansible ring which closes upon said valve-seat to outoff the gas, and a tip also carried by said expansiblc ring,substantially as described.

4. In an automaticcut-off gas-burner,a case or body having agas-passage, a valve-seat, and a tubular portion, an expansible ringsliding telescopically in said tubular portion when contracted, andadapted to frictionally engage therewith when expanded, a valveplatecarried by said expansible ring which closes upon said valve-seat to cutoff the gas, and a spring for closing said valve-plate upon its seat,substantially as described.

5. In an automatic-cut-off gas-burner, a case or body having agas-passage, a valve-seat,

and a tubular portion, an expansible ring sliding telescopically in saidtubular portion when contracted, and adapted to frictionally engagetherewith when expanded, a valveplate carried by said expansible ringwhich closes upon said valve-seat to out off the gas, a tip also carriedby said expansible ring, and a spring-actuated rod for engaging said tipand raising it together with the ring and valve-plate carried by it,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRED F. CUSIIMAN.

Vitnesses:

B. J. NoYEs, ARTHUR F. RANDALL.

